电力变压器的非线性模型

Nonlinear Models for Power Transformers

本文根据变压器的铁芯、铁壳饱和非线性,提出了一个实用的、准确的、并且易于搜集参数的变压器模型。这一变压器模型可广泛地用于变压器暂态和稳态行为的研究,而且形成的变压器与系统接口矩阵又为具有多台变压器的复杂系统仿真计算铺平了道路。本文的计算结果与实测结果有很好的吻合,从而证明了所建模型的正确性。

A new, more effective and exact three-phase core-type transformer model based on saturation nonlinearity of its cores and yokes is proposed in this paper. The parameters of which can easily be found from its open-circuit and short-circuit test data together with its positive-sequence and zero-sequence saturation curves. This model can be used extensively in studying the steady-state as well as the transient state of the transformer itself. The corresponding interface of the transformer with the network provides a measure for simulating complicated power system performances as well.The results obtained by computation tally fairly well with the data measured from experiments. Thus the validity of the proposed model is verified.